10649909 has 2 divisors, whose sum is σ = 10649910. Its totient is φ = 10649908.

The previous prime is 10649893. The next prime is 10649923. The reversal of 10649909 is 90994601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7171684 + 3478225 = 2678^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 10649909 - 2⁴ = 10649893 is a prime.

It is a super-2 number, since 2×10649909² = 226841123416562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10649959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5324954 + 5324955.

It is an arithmetic number, because the mean of its divisors is an integer number (5324955).

Almost surely, 2^10649909 is an apocalyptic number.

It is an amenable number.

10649909 is a deficient number, since it is larger than the sum of its proper divisors (1).

10649909 is an equidigital number, since it uses as much as digits as its factorization.

10649909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 10649909 is about 3263.4198320167. The cubic root of 10649909 is about 220.0131465973.

The spelling of 10649909 in words is "ten million, six hundred forty-nine thousand, nine hundred nine".